Compressor



Feb. 20, 1962 Filed Jan. 6, 1958 E. T. NEUBAUER 3,021,995

COMPRESSOR 2 SheetsSheet 1 IN VENTOR.

EM L T NEUBAUEE ATTORNEYS Feb. 20, 1962 E. T. NEUBAUER 3,021 ,995

COMPRESSOR Filed Jan. e, 1958 2 Sheets$heet 2 IN VENTOR. EM\\ T.NEUERDEE hv ztw ATT \QNE S 3,021,995 1 Patented Feb. 20, .1962

3,021,995 J COMPRESSOR Emil T. Neubauer, La Crosse, Wis., assigno rtoThe Trane Company, La Crosse, Wis., a corporation of Wisconsin FiledJan. 6, 19 58, Ser. No. 707,381

' 4 Claims. '(Cl.' 230-58) This invention relates to compressors andparticularly to'compressors in which the motor and compressor areenclosed in a hermetically sealed casing. i I In compressors of thistype the manifolding of .the

discharge gases has generally been accomplished by providing tubing orpiping in fluid connection with each of the cylinder heads. Suchmanifolds are rather expensive to build and they are subject to damagein assembly. It is, therefore, an object of this invention to eliminatethe usual discharge heads and pipemanifold and to provide a manifoldchamber between the compressor body and the compressor casing. J

It isvanother object of this invention to, provide an extra sheet metallayer between the compressor body and the compressor casing to reducethe transmission of noise r u t ca i v v It is an object ofthisinvention to provide a hermetically sealed motor compressor unit ofimproved design which is inexpensive to manufacture and which operatesatlhigh efliciency.. v i 2 Other objects and advantages of thisinvention will become apparent as the specification proceeds to describethe apparatus with reference to the accompanying drawings in which:

FIGURE 1 is a cross sectional view substantially in an axial plane ofthe compressor of this invention;

FIGURE 2 is a cross sectional view taken on line 2-2 of FIGURE 1.

FIGURE 3 is a partial sectional view on an axial plane showing amodification of the invention shown in FIGURE 1.

Referring now to FIGURE 1, the compressor has a casing 8 having an uppershell 10 and a lower shell 12 both of which are preferably of sheetmetal and which are welded together by a peripheral weld 14. The lowerend of the lower shell 12 serves as a reservoir for oil 13. A compressorbody 15 is supported in the lower shell 12 and has flanges 16 and 17which have peripheral grooves 18 and 19. O-rings 20 and 22 of neoprene,rubber or other flexible material are mounted in the grooves 18 and 19respectively. The flange 17 rests upon the shoulder 24 of the lowershell 12. Other types of stops may be used.

A shaft 26 is rotatably mounted in the compressor body 15 by bearings 28and 30. The shaft 26 is also supported in a bearing spider 31. A motorrotor 32 is secured to the shaft 26. A motor stator 34 is secured in anysuitable manner to the body 15.

A compressor having three cylinders 35 has been shown in the drawings.There are, therefore, three cylinder liners 36 supported in thecylinders 35. It should be understood that the invention is applicableto compressors having a diflerent number of cylinders. Pistons 38operate in cylinder liners 36 and have connecting rods 40 which aremounted for relative rotation on the shaft 26. A suction valve cage 42is mounted upon the cylinder liner 36 and is secured thereto by a ring44. A discharge valve cage 46 contains a ring plate valve 45 which hassprings 47 acting to move the valve toward closed position. Thedischarge valve cage is mounted upon the suction valve cage 42. ABelleville spring 48 is held in place by a snap ring 50 which is engagedin a groove in the cylinder. This Belleville spring 48 acts upon thedischarge valve cage 46 to urge it against the suction valve cage 42which in turn holds liners 36.

21 the cylinder liner 36 in place. The discharge gas passing through thedischarge valve cage 46 enters the space 52 bounded by the flanges 16and 17, other portions of the body. 15 and the wall of the lower shell12.

A discharge conduit 54 is secured to the lower shell 12 as by brazing orwelding and communicates with the manifold chamber 52. A suctionconduit, not shown,

is secured to the flanged opening 56 in the upper shell 10.. The suctiongas flows through passageways 58 in the rotor 32, and thence to theinterior of the cylinder 3, the parts of the compressor are as shown anddescribed in FIGURE 1 except that the lower shell 59 of the casing hasan annular member 60, preferably of metal, in frictional contacttherewith. v The annular member 60 is in sealing contact with the On'ngs 20 and 22 and thus with the, flanges 16 and 17 of the body 15. Adischarge conduit 56 is secured to the annular member 60 and the lowershell 59 by a welding bead 62.

Pulsations of gas to or from the cylinders tend to set up audiblevibrations in the casing of a compressor. By providing the annularmember 60 audible vibrations are dampened. The member 60 may move towardand away from the wall of the lower shell 59 in the area of thepulsation thus absorbing some of its energy. There is also some frictionbetween annular member 60 and lower shell 59. This friction also removesenergy from the pulsations and further dampens audible vibrations.

Although only preferred embodiments of the invention have been shown anddescribed, it will be apparent to those skilled in the art that variousmodifications may be made therein without departing from the scope ofthe invention, and I desire to be limited only by the claims.

I claim:

1. In a compressor, a body, a shaft rotatably mounted in said body,drive means on said body and secured to said shaft for rotatably drivingsaid shaft, a wall on said body extending axially of said shaft andbeing spaced from and surrounding said shaft, spaced radial flangesextending outwardly from said wall and having substantially circularperipheries, cylinders extending from said Wall between said radialflanges and having their axes radial of the axis of said shaft, twoshells in sealed abutting relationship to each other and enclosing saidbody and said drive means, an annular member fitting inside of one ofsaid shells, said annular member being in fn'ctional contact at asubstantial portion of its outer surface with the inner surface of saidone shell whereby vibrations in said annular member are dampened, gasketsealing means in sealing engagement with the substantially circularperipheries of said spaced radial flanges and in sealing engagement withsaid annular member to form a substantially annular chamber, pistons insaid cylinders operating to discharge gas into said substantiallyannular chamber and connecting rods pivotally secured to said pistonsand pivotally secured to said shaft to transmit a driving force fromsaid shaft to said pistons.

2. In a compressor, a body, a crankshaft rotatably mounted in said body,a motor having a stator secured to said body and a rotor secured to saidcrankshaft, a plurality of cylinders on said body, said cylinders beingarranged radially of the axis of said crankshaft, a piston working ineach cylinder to discharge gas outwardly from the ends of saidcylinders, piston rods pivotally connected to said pistons and to saidcrankshaft, a first peripheral flange on said body at one side of saidcylinders, a second peripheral flange on said body at the other side ofsaid cylinders, said first and second flanges extending outwardly beyondsaid cylinders, a cup shaped upper shell, an imperforate cup shapedlower shell, means sealing said upper shell to said lower shell to forma casing body and a hermetically enclosing said body and said motor,said 7 ,lower shell being in sealed engagement with said peripheralflanges to enclose the space therebetween to provide a dischargemanifold, and a discharge conduit in fluid communication with thedischarge manifold :and extending through said lowershell.

'3. In a compressor, a body, a shaft rotatably mounted in said body, amotor having a stator secured to said rotor secured to said shaft, aplurality of cylinders on said body, said cylinders being arrangedradially of the axis or said shaft, a piston working in each cylinder,piston rods pivotally connected to said pistons and to said shaft, afirst peripheral flange on "said body at one side 'of said cylinders, asecond peripheral flange on said body at the other side of saidcylinders, said first and second flanges extending outwardly beyond saidcylinders, a cup shaped upper shell,

an "imperforate cup shaped lower .shell, means sealing said upper shellto said lower shell to form a casing hermetically enclosing said bodyand said motor, gasket means on said first and second peripheralflanges, said gasket means being in sealing engagement with said "lowershell to provide a discharge manifoldbetween said body and said lowershell, and a discharge conduit in fluid communication with the dischargemanifold and extending through said lower shell.

' i 4; In acompressor, a body, a shaft rotatably mounted t a 4 V andhaving substantially circular peripheries, cylinders extending from saidwall ibetweensaidradial flanges and having their axes radial of the axisof said shaft, a cup shaped upper shell, an imperforate cup shaped lowershell, means sealing said upper shell to said lower shell to form acasing hermetically enclosing said body and said motor, aportion of saidlower shell being in sealed engagement with said spacedradial flangesand extending therebetween to form with'said spaced radial flanges andwith said wall a-substantially annular chamber, said portion of saidlower shell also serving as an exterior wall portionof saidcasing,pistons*in:said cylinders operating to draw gasintosaid cylindersand :to discharge gas ,into said substantially annular-chamber,connecting rods pivotally secured tosaid1pistonszandpivotally secured tosaid shaft ;to transmit :aidriving v force from said shaft to saidpistons, discharge valve cages mounted on said :body :within *said:cylinders, tdischarge valves mounted, in ,said discharge xvalve cagesfor controllingzthe ,flo'w of gas from said cylinders 10zsaid-fsubstantially annular chamber, and conduit means influidqcommunication with said substantiallyannular zchamberzforconducting fluid though said portion of said lower shell.

References Cited in the me of this patent UNITED STATES .BATENTS2,053,593 Ziska et al. Sept. 8, 1936 2,304,999 @Gonzalez Dec. '15, 1942FOREIGN PATENTS H 648,189 France Dec. .6, .1928

